Usage: dcb [ OPTIONS ] OBJECT { COMMAND | help }
       dcb [ -f | --force ] { -b | --batch } filename [ -n | --netns ] netnsname
where  OBJECT := { app | apptrust | buffer | dcbx | ets | maxrate | pfc | rewr }
       OPTIONS := [ -V | --Version | -i | --iec | -j | --json
                  | -N | --Numeric | -p | --pretty
                  | -s | --statistics | -v | --verbose]